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Aux rad delete - bung sizes?

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  • Aux rad delete - bung sizes?

    Afternoon all, I've searched and not found this info - apologies in advance if I missed it somewhere...

    What bung size(s) are needed to stop up the pipes when deleting the aux rad?

    I ordered a replacement from GSF (with one of their discount codes, so expensive but not "list price" at £350), but they've just been in touch to say they can't get it. Since mine is leaking, if I can't replace it then it'll have to go.

    Thanks in advance
    Shocked, exhausted, hosed, bushed, dumped, chipped, mounted, filtered, gauged, packed, intermittantly wiped and braked. I mean broken. Now, about the car...

  • #2
    List price £350???? What on earth??!!

    If your matrix has failed but the end tanks are still good - Get your old one re cored for heavens sake, you will pay around £100.

    GSF should be ashamed.

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    • #3
      They seem to have near permanent discount codes, and the one I used was for 50% off so it ended up being c. £175. I wouldn't have even contemplated more than £200!

      Mine is indeed leaking in the middle so could be re-cored, but I'm also contemplating using the space where the aux rad is for the larger oil cooler mod - hence needing to know bung sizes.
      Shocked, exhausted, hosed, bushed, dumped, chipped, mounted, filtered, gauged, packed, intermittantly wiped and braked. I mean broken. Now, about the car...

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      • #4
        25mm barbed metal plug from plumbing supply store and hose clamps. 2 of each. Copper plugs would be better

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        • #5
          Originally posted by Audicted View Post
          25mm barbed metal plug from plumbing supply store and hose clamps. 2 of each. Copper plugs would be better
          Thank you!

          Any reason for copper in particular? I can find machined aluminium/alloy pipe plugs in that size easily, but haven't found any copper ones yet.
          Shocked, exhausted, hosed, bushed, dumped, chipped, mounted, filtered, gauged, packed, intermittantly wiped and braked. I mean broken. Now, about the car...

          Comment


          • #6
            You can still get the Aux delete hose from Audi Tradition for a reasonable price. Just fitted mine today and makes it much more tidy
            Nothelle S2 Avant in restoration
            Wr Ur Quattro (also in restoration)

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            • #7
              Originally posted by Tractor Dave View Post
              You can still get the Aux delete hose from Audi Tradition for a reasonable price. Just fitted mine today and makes it much more tidy
              Excellent! Can you give me a part number or direct link to the part please?
              Shocked, exhausted, hosed, bushed, dumped, chipped, mounted, filtered, gauged, packed, intermittantly wiped and braked. I mean broken. Now, about the car...

              Comment


              • #8
                DSCF9174.jpg

                I used 22mm external stop ends. Any diy store has them.
                1989 90 quattro 20v Sport
                1992 80 quattro 20vT

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                • #9
                  https://shops.audi.com/en_GB/web/tra...-893121055b-10
                  Order it now as the shop is closing for update tomorrow.
                  Nothelle S2 Avant in restoration
                  Wr Ur Quattro (also in restoration)

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                  • #10
                    Merlin Motorsport do the bung in aluminium
                    Nothelle S2 Avant in restoration
                    Wr Ur Quattro (also in restoration)

                    Comment


                    • #11
                      Originally posted by curlyks2 View Post

                      Thank you!

                      Any reason for copper in particular? I can find machined aluminium/alloy pipe plugs in that size easily, but haven't found any copper ones yet.
                      I use the anodised aluminium ones from eBay, usually listed as dump valve plug

                      For example

                      https://www.ebay.co.uk/itm/222161705536

                      S2 Coupe 3B Project


                      Ur quattro restoration

                      S2 Avant

                      Boost is the new rock and roll!
                      sigpic

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                      • #12
                        I was thinking about this last week and have 2 questions: -

                        1. How does the Audi delete hose fit as I thought the idea was that you should not bridge the aux pipes to form a loop but better to bung them as per the above posts?

                        2. If going the bung route, I was also looking at alloy eBay jobs and they offer a range of sizes so is 25mm or 22mm more suitable?

                        Cheers n beers (emoji here)
                        Si
                        Last edited by HPmuirt; 29th June 2020, 17:58. Reason: terrybubble speeling
                        95 ABY S2 Coupe - Ragusa Green
                        Subtle mods here and there


                        2011 A5 3.0 TDi - Lava Grey
                        With every option available (except a towball)

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                        • #13
                          Originally posted by HPmuirt View Post
                          I was thinking about this last week and have 2 questions: -

                          1. How does the Audi delete hose fit as I thought the idea was that you should not bridge the aux pipes to form a loop but better to bung them as per the above posts?

                          2. I going the bung route, I was also looking at ally eBay jobs and they offer a range of sizes so is 25mm or 22mm more suitable?

                          Cheers n beers (emoji here)
                          Si
                          It's just the hose from the 7a engine which never had an aux rad. It's a perfect fit
                          Nothelle S2 Avant in restoration
                          Wr Ur Quattro (also in restoration)

                          Comment


                          • #14
                            Originally posted by Tractor Dave View Post
                            It's just the hose from the 7a engine which never had an aux rad. It's a perfect fit
                            For reference, 7A has auxiliary radiator.

                            Comment


                            • #15
                              Originally posted by HPmuirt View Post
                              I was thinking about this last week and have 2 questions: -


                              2. If going the bung route, I was also looking at alloy eBay jobs and they offer a range of sizes so is 25mm or 22mm more suitable?

                              Cheers n beers (emoji here)
                              Si
                              The 22mm is reference to the copper pipe outside diametre, add on the thickness of the copper end cap itself and it becomes 25mm. The raised solder ring does am alright job of acting like a bead for clamping your hose clip at.

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